Probability

Front

What is probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

What does a probability of 0 mean?

Back

A probability of 0 means that the event will not occur.

Front

What does a probability of 1 mean?

Back

A probability of 1 means that the event is certain to occur.

Front

How do you calculate the probability of an event?

Back

Probability = (Number of favorable outcomes) / (Total number of possible outcomes).

Front

If the probability of an event is 30%, what is the probability that it will NOT happen?

Back

The probability that it will NOT happen is 70%.

Front

In a bag with 4 red, 3 blue, and 5 green balls, what is the probability of picking a blue ball?

Back

Probability of picking a blue ball = 3/(4+3+5) = 3/12 = 1/4.

Front

What is a sample space in probability?

Back

A sample space is the set of all possible outcomes of a probability experiment.

Front

If you flip a coin, what are the possible outcomes?

Back

The possible outcomes are Heads and Tails.

Front

What is the probability of rolling a 3 on a standard six-sided die?

Back

Probability = 1/6, since there is one favorable outcome (rolling a 3) out of six possible outcomes.

Front

What is the probability of selecting a red marble from a jar containing 2 red, 3 blue, and 5 green marbles?

Back

Probability = 2/(2+3+5) = 2/10 = 1/5.